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Converter transformer double side voltage applying partial discharge testing device and testing method thereof

A test device and rheological converter technology, applied in the field of electricity, to reduce test costs, save manpower and material resources, and improve test results and efficiency

Inactive Publication Date: 2014-12-03
YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The test method is carried out in the following 7 steps:

Method used

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  • Converter transformer double side voltage applying partial discharge testing device and testing method thereof
  • Converter transformer double side voltage applying partial discharge testing device and testing method thereof
  • Converter transformer double side voltage applying partial discharge testing device and testing method thereof

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Embodiment Construction

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments.

[0018] like figure 1 As shown in the figure, a commutation transformer bilateral voltage partial discharge test device and its test method are composed of a P1 variable frequency power supply, a T1 excitation transformer, a T2 excitation transformer, an L1 compensation reactor, an L2 compensation reactor, and a C1-C6 capacitor voltage divider. , PD detector, Em ground terminal block, CT1-CT4 current transformer;

[0019] Among them, the low-voltage side of the P1 variable frequency power supply is connected to the 380V power supply of the main grid, and the high-voltage side is connected to the T1 excitation transformer and the low-voltage side of the T2 excitation transformer. The side polarity terminal is connected to D (the valve side winding of the converter transformer); the non-polar terminal of the high vo...

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PUM

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Abstract

The invention discloses a converter transformer double side voltage applying partial discharge testing device and a testing method thereof. The testing device is composed of a variable-frequency power supply P1, an exciting transformer T1, an exciting transformer T2, a compensation reactor L1, a compensator reactor L2, capacitive voltage dividers C1-C6, a partial discharge detector, a grounding terminal block Em and current transformers CT1-CT4. The invention provides a converter transformer double side voltage applying partial discharge testing method for the first time, and establishes a converter transformer double side voltage applying partial discharge test wiring method and converter transformer double side voltage applying partial discharge test procedures. Compared with a traditional partial discharge method, the testing method disclosed by the invention greatly improves test effects and the test efficiency. The converter transformer double side voltage applying partial discharge testing device and the testing method thereof have popularization values through experimental verification, and provide valuable guidance and reference for exploring a transformer partial discharge testing method.

Description

technical field [0001] The invention belongs to the field of electricity, and in particular relates to a device and a test method for performing partial discharge under pressure on both sides of a converter transformer in the field of high voltage and ultra-high voltage. Background technique [0002] The converter transformer is an indispensable equipment in the DC transmission project, and its operation state directly affects the safety and stability of the DC system. In addition to the role of the conventional AC transformer, it also realizes the mutual conversion between AC and DC together with the converter valve, and isolates the DC system and the AC system from each other. Its impedance can also limit the short circuit of the valve arm and the DC bus. The action of the short-circuit fault current prevents the converter valve from being damaged. [0003] Partial discharges are electrical discharges in which the conductor-to-conductor insulation is only partially bridge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 沈鑫曹敏闫永梅马红升王昕张林山吴水军
Owner YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST
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